package Task16;

import java.util.Scanner;

/**
 * 完全数计算
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()){
            int n = scanner.nextInt();
            int count = 0;
            for (int i = 1; i < n ; i++) {
                int sum = 0;
                for (int j = 1; j < i ; j++) {
                    if( i % j == 0){
                        sum += j;
                    }
                }
                if(sum == i){
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}
